Yes, it's an addiction, but the biggest obstacle is giving that word 'addiction' too much power over you. Attitude is everything. There are a million reasons not to quit, but you can't smoke if there isn't one in your hand, or if you don't have a way to light it.
I was lucky when I quit. I was smoking 2 packs a day. I'd half-assed tried to quit a dozen times, but I didn't really want to. But on March 25, 1990, I was getting ready to leave the US to go to my new station in the UK (I was in the Air Force). I got up that morning & noticed that I only had 3 or 4 cigarettes left in the pack. On impulse, I dropped them in the trash
before having that first smoke of the morning. I think that was key. My beloved thought I'd lost my mind. I could see her silently estimate how long I'd last before I grabbed the pack back & lit up. *wry grin*
When we left the hotel & got to JFK, the ticket lady asked "Smoking or non-smoking?" Y'all remember those days? I said "Non-smoking." and thought I would have to catch my beloved as she fainted dead away. Instead she laughed at the joke, but couldn't believe it when I didn't change my mind. Honestly, I was thinking that the smoking section was bound to have an empty seat, and you can always find someone willing to spare a cigarette.
Well, the plane was packed, and I found it hard to ask a complete stranger for a cigarette, so I didn't get any smokes the whole flight to England. Once we arrived, I decided to see how long I could last. Well, since nobody knew me, they all assumed I was a non-smoker and treated me as such. I never told anyone I was "trying" to quit, so no one felt obligated to ask me how it's going with my quitting, or share their own horror stories of trying to quit, or any of the other things that serve only to torture the person trying to quit. I was simply, and suddenly, a non-smoker.
I haven't smoked since. I have to say that I was deathly afraid to drink for about 4 months because smoking is such a natural partner to it. I've since overcome that problem. I mean, I'm no saint, right?